Nonlocal Network Coding in Interference Channels

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In a network, a channel introduces correlations to the parties that aim to establish a communication protocol. We present a framework of nonlocal network coding by exploiting a Bell scenario and show the usefulness of nonlocal and quantum resources in network coding. Two-sender and two-receiver interference channels are considered, for which network coding is characterized by two-input and four-outcome Bell scenarios. It is shown that nonsignaling correlations lead to strictly higher channel capacities than quantum correlations in general. This also holds true for quantum and local correlations: network coding with quantum resources shows a strictly higher channel capacity than local ones. It turns out, however, that more nonlocality does not necessarily imply a higher channel capacity. The framework can be generally applied to network communication protocols.
Publisher
AMER PHYSICAL SOC
Issue Date
2020-10
Language
English
Article Type
Article
Citation

PHYSICAL REVIEW LETTERS, v.125, no.15, pp.150502

ISSN
0031-9007
DOI
10.1103/PhysRevLett.125.150502
URI
http://hdl.handle.net/10203/276997
Appears in Collection
EE-Journal Papers(저널논문)
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